Background: Adolescents experience growth and significant changes in body composition which influence physical activity and response to sport or exercise. The level of physical fitness in adolescent girls is usually lower than that of boys, due to differences in body composition and levels of physical activity. The aim of this study was to examine the relationship between fat mass percentage, body composition, physical activity, and physical fitness.Design and Methods: This study used an analytical observational, and cross-sectional design with total samples consisting of 70 male and female students aged 14-15 years. They were selected through simple random sampling, and the data collected were anthropometric measurements, body composition, physical activity and physical fitness. In addition, the Pearson correlation test was used for data analysis.Results: The results showed that 68.57% of participants had a normal body mass index, 74.3% had moderate physical activity, and 44.28% had fat mass percentage including an obesity category and, 54.29% had low physical fitness. Furthermore, the Pearson test showed a significant relationship between physical activity, body mass index and fat mass percentage with physical fitness.Conclusions: An increased fat mass percentage is associated with decreased levels of physical fitness. Furthermore, a good determinant of low physical fitness in obese conditions is the percentage of fat mass rather than BMI.

BACKGROUND: Delayed Onset Muscle Soreness (DOMS) is a common injury resulting from abnormal intensive training in athletes, mainly the result of training involving eccentric contractions. AIM: The aim of this study was to determine the correlation between the incidence of DOMS and HMGB1 as a marker of the occurrence of inflammation post Exercise Induces Muscle Damaged. METHOD: 28 male recreational students of Sports Science Department, Universitas Negeri Surabaya who met all inclusion and exclusion criteria participated in this study. Participants completed a muscle damaging exercise which consists of a 10x10 drop jump (DRP) and a bout of 40×15 m sprints with a 5 m deceleration zone (SPR) to obtain a muscle damage effect. In this study, the stretching in the exercise session was not given, this was done to get the DOMS effect after exercise. DOMS and HMGB1 was carry out 1 hour before the exercise, 12 hours after the exercise, 24 hours after the exercise and 48 hours after the exercise. RESULT: The result showed that there was a significant correlation (r=0.935, p<0.05) between DOMS and HMGB1 as a predictor of inflammation. The participants that were given EIMD eccentric exercise (DRP and SPR) showed the occurrence of DOMS and increasing of HMGB1. The result also showed that there was a correlation between DOMS and HMGB1. CONCLUSION: This study concluded that there was a correlation between DOMS and HMGB1 as a marker of inflammation as the result of the eccentric exercise of the exercise Induced Muscle Damage (EIMD).

This research aims to evaluate the online lecture process during the pandemic period, as well as measure the level of student satisfaction towards the implementation of online lectures at the Faculty of Sports Science, Universitas Negeri Surabaya. This research was descriptive study with a survey research model. Sample withdrawal was done by purposive sampling method, which determines the class of 2017- 2020 as a research respondent. The student assessment and satisfaction questionnaire were measured using the Likert scale with alternative answers 1 (dissatisfied) to 4 (very satisfied). The data was descriptively analyzed and bivariate using independent t-test and Anova one way tests. A total of 50.5% of students have a  good internet conditions. Lack of concentration is the most common problem (28.1%). The next problem is more lectures give students many assignments (17.6%). Overall, students' assessment of the online lecture process during the COVID 19 pandemic was good, While the level of student satisfaction with online lectures in the faculty of sports science is in the satisfied category. This result will be evaluated for lecturers and education personnel to continuously improve the quality of service to students.

Latar Belakang: Olahraga atau latihan yang intens mengakibatkan peningkatan penggunaan substrat oleh otot-otot yang bekerja, yang kemudian meningkatkan konsumsi oksigen. Peningkatan konsumsi oksigen yang berikatan dengan aktivasi jalur metabolisme spesifik akibat pelaksanaan aktivitas latihan kemudian memicu peningkatan produksi ROS. Peningkatan Radikal bebas (ROS) selanjutnya dapat mengakibatkan kerusakan sel. Kencur (kaempferia galanga linn) merupakan tanaman yang dipercaya memiliki senyawa bioaktif, diantaranya adalah senyawa fenolik yang memiliki aktivitas sebagai antioksidan. Tujuan: Penelitian ini bertujuan untuk mengetahui efektivitas suplementasi ekstrak kencur (kaempferia galanga linn) selama 14 hari pada plasma MDA dan IL-6 pasca aktivitas latihan aerobik Metode: Penelitian ini merupakan penelitian quasy experiment, dengan pendekatan pretest - Post Test Control Group Design. Sejumlah 30 Mahasiswa Fakultas Ilmu Olahraga Universitas Negeri Surabaya yang memenuhi kriteria inklusi dan eksklusi berpartisipasi dalam penelitian ini terbagi menjadi 2 kelompok yakni kelompok ekstrak kencur (KG) sebanyak 200mg/day dan kelompok placebo (Pl). Proses suplementasi dilakukan selama 15 hari (14 hari sebelum dan 1 hari setelah latihan aerobik). Partisipan menyelesaikan latihan aerobik (LA) yang terdiri atas 2x800 m dengan interval 2 menit. Pengukuran plasma MDA dan IL-6 dilakukan 24 jam setelah LA. Data perubahan kadar plasma MDA dan IL-6 sebelum dan setelah 15 hari masa suplementasi Uji beda menggunakan repeated measures ANOVA dengan taraf signifikansi P<0.05.  Hasil: terdapat perbedaan rata-rata plasma MDA dan IL-6 pada masing-masing kelompok dengan nilai signifikansi MDA adalah sebesar p = 0.000 dan nilai signifikansi Il-6 adalah p = 0.000 Kesimpulan: Suplementasi ekstrak kencur (Kaempferia Galanga Linn) selama 15 hari efektif untuk menurunkan peningkatan stress oksidatif (MDA) dan peningkatan sitokin proinflamasi (IL-6) pasca pelaksanaan aktifitas latihan aerobic. Kata kunci: Kencur, stress oksidatif, ROS, latihan arobik, antioksidan, sitokin